滨海核电厂取水堵塞物卷吸风险研究  

Research on the entrainment risk of blockage in water intake of nuclear power plants

作　　者：黄倩 智一凡 姜新舒 马璞月 张真 代丽 李奇 张荣勇 HUANG Qian;ZHI Yifan;JIANG Xinshu;MA Puyue;ZHANG Zhen;DAI Li;LI Qi;ZHANG Rongyong(China Nuclear Power Engineering Co.,Ltd.,Beijing 100840,China)

机构地区：[1]中国核电工程有限公司,北京100840

出　　处：《给水排水》2024年第S1期665-669,共5页Water & Wastewater Engineering

摘　　要：漂浮型致灾物通常包括水草、藻类等无游泳能力海生物和水母、毛虾等弱游泳能力的海生物,这类堵塞物在我国核电站取水堵塞事件中占比超过90%,是影响国内外电站冷源取水安全的重要隐患。建立了核电厂取水口附近海域水动力模型和漂浮型致灾物迁移数学模型,不同方向释放粒子的模拟结果显示,进入明渠的粒子具有明显的时空分布特征。总体来看,漂浮物进入明渠的主要方式是随落潮流从西堤侧进入明渠,对于源头为SW~W向的漂浮物,在一个潮流周期内均有不同程度的漂浮物流向渠内;而对于N~E~S来向的漂浮物,具有更加明显的时空特征,在涨潮期间内若无法随水体运动至堤头西侧,则没有“机会”进入到明渠。进入明渠的漂浮物主要以WSW~W向为主,不同时刻进入明渠的通量大小有较大差别。当漂浮物距离堤头超过6 km,在一个潮周期内,几乎没有漂浮物进入明渠。Floating disaster-caused substance typically include non swimming marine organisms such as aquatic plants and algae,as well as weakly-swimming ability marine organisms such as jellyfish and crayfish.These types of blockages account for over 90%of water intake blockages in China's nuclear power plants,and are an hidden trouble that affects the safety of cold source water intake for nuclear power plants.This study established a hydrodynamic model and a mathematical model for the migration of floating substance near the water intake sea area of a nuclear power plant.Simulation results of particles released in different directions showed that particles entering the open channel had obvious spatiotemporal distribution characteristics.In general,the main way for floating substance to enter the open channel is to follow the falling tide and enter the channel from the west embankment side.For floating substance with a source in the SW~W direction,floating substance flowing into the channel in varying degree within a tidal cycle.For the floating substance in the direction of N~E~S,more obvious spatiotemporal characteristics were found.If it cannot move with the water to the west side of the embankment during high tide,there is no“opportunity”to enter the open channel.The floating substance entering the open channel is mainly in the WSW~W direction,and the flux entering the open channel varies greatly at different times.When the distance between the floating substance and the embankment exceeds 6 km,almost no floating substance enters the open channel within a tidal cycle.

关 键 词：核电厂 取水安全 卷吸风险 数值模拟 

分 类 号：TU991[建筑科学—市政工程]